{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:20.126759", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2024-Oct-16_to_2024-Oct-18_276.0_30.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2024100000337}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "October 16 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 18 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 56441.90309061884}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 30.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 276.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "276.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 273.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 276.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-87.18, 30.68], [-87.03, 31.03], [-86.5, 31.25], [-86.25, 31.15], [-86.0, 31.25], [-85.47, 31.03], [-85.32, 30.68], [-85.0, 30.54], [-84.5, 30.75], [-84.25, 30.65], [-84.0, 30.75], [-83.47, 30.53], [-83.25, 30.0], [-83.35, 29.75], [-83.32, 29.68], [-82.97, 29.53], [-82.75, 29.0], [-82.97, 28.47], [-83.5, 28.25], [-83.75, 28.35], [-84.0, 28.25], [-84.25, 28.35], [-84.5, 28.25], [-84.75, 28.35], [-85.0, 28.25], [-85.25, 28.35], [-85.5, 28.25], [-85.75, 28.35], [-86.0, 28.25], [-86.53, 28.47], [-86.68, 28.82], [-86.75, 28.85], [-87.0, 28.75], [-87.53, 28.97], [-87.75, 29.5], [-87.65, 29.75], [-87.75, 30.0], [-87.53, 30.53], [-87.18, 30.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.75, 30.0], [-87.52999999999997, 30.53], [-87.18, 30.68], [-87.02999999999997, 31.03], [-86.5, 31.25], [-86.25, 31.15], [-86.0, 31.25], [-85.47000000000003, 31.03], [-85.32, 30.68], [-85.0, 30.54], [-84.5, 30.75], [-84.25, 30.65], [-84.0, 30.75], [-83.47000000000003, 30.53], [-83.25, 30.0], [-83.35000000000002, 29.75], [-83.32, 29.68], [-82.97000000000003, 29.53], [-82.75, 29.0], [-82.97000000000003, 28.47], [-83.5, 28.25], [-83.75, 28.35], [-84.0, 28.25], [-84.25, 28.35], [-84.5, 28.25], [-84.75, 28.35], [-85.0, 28.25], [-85.25, 28.35], [-85.5, 28.25], [-85.75, 28.35], [-86.0, 28.25], [-86.52999999999997, 28.47], [-86.68, 28.82], [-86.75, 28.85], [-87.0, 28.75], [-87.52999999999997, 28.97], [-87.75, 29.5], [-87.64999999999998, 29.75], [-87.75, 30.0]]]]}, "2024-10-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.75, 30.0], [-87.52999999999997, 30.53], [-87.18, 30.68], [-87.02999999999997, 31.03], [-86.5, 31.25], [-86.25, 31.15], [-86.0, 31.25], [-85.47000000000003, 31.03], [-85.32, 30.68], [-85.0, 30.54], [-84.5, 30.75], [-84.25, 30.65], [-84.0, 30.75], [-83.47000000000003, 30.53], [-83.25, 30.0], [-83.35000000000002, 29.75], [-83.32, 29.68], [-82.97000000000003, 29.53], [-82.75, 29.0], [-82.97000000000003, 28.47], [-83.5, 28.25], [-83.75, 28.35], [-84.0, 28.25], [-84.25, 28.35], [-84.5, 28.25], [-84.75, 28.35], [-85.0, 28.25], [-85.25, 28.35], [-85.5, 28.25], [-85.75, 28.35], [-86.0, 28.25], [-86.52999999999997, 28.47], [-86.68, 28.82], [-86.75, 28.85], [-87.0, 28.75], [-87.52999999999997, 28.97], [-87.75, 29.5], [-87.64999999999998, 29.75], [-87.75, 30.0]]]]}, "2024-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.75, 30.0], [-87.52999999999997, 30.53], [-87.18, 30.68], [-87.02999999999997, 31.03], [-86.5, 31.25], [-86.25, 31.15], [-86.0, 31.25], [-85.47000000000003, 31.03], [-85.32, 30.68], [-85.0, 30.54], [-84.5, 30.75], [-84.25, 30.65], [-84.0, 30.75], [-83.47000000000003, 30.53], [-83.25, 30.0], [-83.35000000000002, 29.75], [-83.32, 29.68], [-82.97000000000003, 29.53], [-82.75, 29.0], [-82.97000000000003, 28.47], [-83.5, 28.25], [-83.75, 28.35], [-84.0, 28.25], [-84.25, 28.35], [-84.5, 28.25], [-84.75, 28.35], [-85.0, 28.25], [-85.25, 28.35], [-85.5, 28.25], [-85.75, 28.35], [-86.0, 28.25], [-86.52999999999997, 28.47], [-86.68, 28.82], [-86.75, 28.85], [-87.0, 28.75], [-87.52999999999997, 28.97], [-87.75, 29.5], [-87.64999999999998, 29.75], [-87.75, 30.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.905839711447641}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.052299283724273}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.342341298905694, 17.676402573358416, 19.331092119973846]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.56646626790365, 13.184505716959677, 14.601255035400413]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9923490873489413, -5.457329194429657, -3.707219569394221]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8347052328656446, -6.905839711447641, -5.390113129756969]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4393851476278074, -2.516517355491752, -1.676143938053735]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.650793163132396, -2.8719613689027987, -2.029998104474781]}}